| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing 1-hexene by trimerizing ethylene, wherein a metal component of a chromium-based catalyst used in a trimerization reaction of ethylene is subjected to demineralization treatment after completion of the reaction. Very low concentration of used catalyst metal components from the reaction product liquid without taking out the generated polymer out of the system and without clogging the reactors, control valves, piping, pumps, etc. during deashing treatment 1- which can be removed up to A method for producing hexene is provided. SOLUTION: After completion of the trimerization reaction, the chromium-based catalyst is deactivated, and then, while maintaining the reaction product solution at a temperature of 100 ° C. or more, water of 20% by volume or more based on the reaction product solution is supplied to the treatment system. The method further comprises a demineralization treatment step of removing the metal component contained in the chromium-based catalyst from the reaction product liquid by stirring the treatment system with a stirring station power of 1 KW / m 3 or more per unit volume. Hexene is manufactured. |